X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/151a33c02724869911f22ed6b1db502404fb8f0c..d2ca5dbfe8def88a3d03493524854a79a2b462a1:/armsrc/i2c.c

diff --git a/armsrc/i2c.c b/armsrc/i2c.c
index 0560d306..3d16b42c 100644
--- a/armsrc/i2c.c
+++ b/armsrc/i2c.c
@@ -18,6 +18,7 @@
 #include "mifareutil.h" // for MF_DBGLEVEL
 #include "BigBuf.h"
 #include "apps.h"
+#include "usb_cdc.h"
 
 #ifdef WITH_SMARTCARD
 #include "smartcard.h"
@@ -257,10 +258,11 @@ static void I2C_Reset_EnterBootloader(void) {
 	WaitMS(10);
 }
 
-// Wait max 300ms or until SCL goes LOW.
+// Wait max 1800ms or until SCL goes LOW.
+// It timeout reading response from card
 // Which ever comes first
-static bool WaitSCL_L_300ms(void) {
-	volatile uint16_t delay = 310;
+bool WaitSCL_L_timeout(void){
+	volatile uint16_t delay = 1800;
 	while ( delay-- ) {
 		// exit on SCL LOW
 		if (!SCL_read)
@@ -272,8 +274,8 @@ static bool WaitSCL_L_300ms(void) {
 }
 
 static bool I2C_WaitForSim() {
-	// variable delay here.
-	if (!WaitSCL_L_300ms())
+	// wait for data from card
+	if (!WaitSCL_L_timeout())
 		return false;
 
 	// 8051 speaks with smart card.
@@ -656,28 +658,6 @@ static bool GetATR(smart_card_atr_t *card_ptr) {
 	if ( !sc_rx_bytes(card_ptr->atr, &len) )		
 		return false;
 
-	uint8_t pos_td = 1;
-	if ( (card_ptr->atr[1] & 0x10) == 0x10) pos_td++;
-	if ( (card_ptr->atr[1] & 0x20) == 0x20) pos_td++;
-	if ( (card_ptr->atr[1] & 0x40) == 0x40) pos_td++;
-	
-	// T0 indicate presence T=0 vs T=1.  T=1 has checksum TCK
-	if ( (card_ptr->atr[1] & 0x80) == 0x80) {
-		
-		pos_td++;
-	
-		// 1 == T1 ,  presence of checksum TCK
-		if ( (card_ptr->atr[pos_td] & 0x01) == 0x01) {
- 			uint8_t chksum = 0;
-			// xor property.  will be zero when xored with chksum.
-			for (uint8_t i = 1; i < len; ++i)
-				chksum ^= card_ptr->atr[i];
- 			if ( chksum ) {
-				if ( MF_DBGLEVEL > 2) DbpString("Wrong ATR checksum");
-			}
-		}
-	}
-
 	card_ptr->atr_len = len;
 	LogTrace(card_ptr->atr, card_ptr->atr_len, 0, 0, NULL, false);